Carbureter.



R. H. SHOOBRIDGE 6a A. F. GUNSTONE.

GARBURETER.

APPLICATION FILED JAN.11, 1913.

Patented July 2l, 191% a SHEETS-SHEET 1.

R. H. SHOOBRIDGE & A. F. GUNSTONE.

GARBURETER.

APPLIOATloN FILED JAN.11.1913.

pjLQQo Patented July 21, 1914.

2 SHEETS-SHEET 2.

T0 ZZ lwhom it may concern:

fra

REGINALD HOFFGAARD SHOOBRIDGE .AND ARTHUR- FREDERICK G-UNSTONE, OF BATH, i ENGLAND.

CARBURETER.

Specification of Letters Patent.-

Patented July 2li, 19ML.

Application led January 11, 1913. Serial No. 741,518.

Be it known that we, REGINALD HOFFGAARD SHooBRIDGE and ARTHUR FREDERICK GUN- sioNE, subjects of ythe King of England, both residing at Bath, England, have invented certain new and useful Improvements in Carbureters, of which the following isa specification.

a proper delivery of hydrocarbon to the carbureting chamber partially or entirely by capillary action.

VIt is an objectof our invention to provide a carbureter of the capillary action type in which the capillary action is exerted in the interstices formed between ribs of metal or other suitable material arranged side by side and united by a web to form a capillary member, the lengths of the said ribs being longitudinal of thevcapillary member; incoming air inipinges against the capillary member, thereby readily absorbing the volatile hydro-carbon, thus coming into more effective contact with the latterand promoting a more intimate, rich land homogeneous mixture.

A further object of our invention is to provide a carbureter constructed of few and simple parts, unitedy into a compact whole, which may readily be disassembled to give access for cleaning.

In describing our invention in detail reference will be had to the accompanying drawing, wherein like symbols refer to like or corresponding parts throughout the several views,'and in which:

Figure 1 is a vertical sectional view. Fig. 2 is a topplan View. Fig. 3 is an end elevation partlyin section. Fig. 4f is an eleva-1 tion of a detail partly in section; and Fig. 5 is a perspective view of the capillary Wick partly in section. y

Referring more particuiarly to the drawings, our improved earbureteris preferably formed in two parts, including an upper or valve casing and a lower or hydrocarbon casing, each section being provided with meeting ianges N and N1, respectively, between which suitable securing means may be en-V gaged.

The lower casing may be constructed of a shell A, of any suitable contour, constituting v a hydrocarbon reservoir and provided witha preferably central and vertical opening defined by the cylindrical wall A3, which is advantageously extended slightly beyond the plane of the top of the shell A to occupy a seat formed in the upper casing, as shown, whereby the sections may be relatively centered with facility, and oppose lateral -displacement, which is essential in maintaining the various openings in alinement, as will bel understood. An annular float C, surrounding and guided by the wall A3, provides, through well-known illustrated means located in an offset A1, for maintaining a constant level ofv hydrocarbon in the reservoir.

Depending from the casing A, coaxial .by means of a hollow nut D threaded into the boss and `engaging a plate F1 constitutn ing the base of the core. A lianged yplug H closes the lower end of the core, as shown, and swivelly engages with the hollow nut D to withdraw the, core upon the removal of the nut. A plurality of apertures E2 admit of communication between the interior of the core and the duct B,

The upper end J of the core E1 is preferably reduced and tapered, as shown at. J1, and a cup E merges from the core below the reduced portion J and provides with the latter an annular feeding chambersv As disclosed to advantage in Fig. 1, thebody of the cup/E is of slightly less diameter than theopening A3, but is provided with a rim closely fitting the same. Communication 1sv established between the hydrocarbon reuen voir A .and the annular intermediate cham.

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longitudinal. of the capillary member is employed' to transfer the hydro-carbon from the feeding chamber to a carbureting chamber hereinafter referred' to. `llfe'preferably utilize vthev forni' of capillary member illustrated in Fig. 5 wherein a supporting web M2 is provided formed in the frustum of a cone and provided w-ith'longitudinally running ribs'M1. In'practice the member is fitted over the end J1 of the core E1, as

clearly shown in Fig; 1, with its lower end ext-ending approximately'to the" base of the cup E, `where it exposesl a relatively large surface to the hydrocarbon.

The interior of the cup E is threaded, as at E3, for a distance from its upper end, and may be provided with'l ai shoulder located immediately below the threads to form a stop for 'an exteriorly-threaded sleeve K having a conicalinterior wall K3 coperating with the conical end J1of the core E1' vto hold the capillary member M in place; A nice regulation of thecapillary action may be obtained-by means of the sleeve, -which 'is provided with a'milledliange K2 for facilitating turning so as to get any required pressure on the member M. -The member M` may be'made of a comparatively soft metal, and the sleeve K may be screwed down to such a degree that the ribs of the member are distorted to some extent. In this way the lmaker can adjust initially the rate of supply .of fuel ina very accurate manner, but obviously such adjustment can be made only once as the member M will not assume its original position on the removal of the pressure.

We find that with 'astructure so far as set up the*y best possible' results are attainable only through the employment of a distributing nozzle 'K1 which, in the instance shown, is formed integral with the sleeve K' and preferably takes the -form of an inverted cone andA operates in conjunction with an auxiliary air supply hereinafter described.

v A tube L is'carried by the sleeve K having its lower end openinginto the feeding chamber and its upper end arranged in thedistributin nozzle K1, whereby to set up comm'unication l,between the feeding and car-v bureting chambers to equalize the pressure in both chambers, and thereby neutralize the Ieffect produced by the suction ofthe engine,

which wouldotherwiseexercise an undue .inf iiuence upon thehydrocarbon in the feeding :chamber through tli'ewick and destroy the capillary action, which has been previously regulated to deliverthe required quantity. c A.The upper section or casing embodies an intake passage P in axial alinement with the ropening A3, and surrounded at its lower portion 4with an annular auxiliary' air v chamber infcommunication with the passage P through aplurality of apertures P3 and supplied through a duct P2 opening to the atmosphere. The duct P2 is provided with a lateral port Q in`re`gistry` with the duct wB.

A valve R mounted ona spindle R1 jour naled inthe walls of the duct*` P2`coi1'trols` inlet of air to the. auxiliary chamberP1'an'd is connected to operate with the mainthrotvtle valve O, as follows The spindle lO1 of` the throttle valve O carriesan arm O2 which is connected through a link U to the arni R2 4carried on the extended 'spindleR The arm O3 is adapted to be oper'ated'by'some suitable mechanism (not shown) to control the fuel supply to the engine, and-simultaneously the valve R is oscillated to` regulate i auxiliary air.

In order to providel for a proper mixture on slow. speeds we constructl a oy-pass, clearly illustrated in-Fig. 3, leading'from a point in the reservoir `A below the liquid `level to the passage P'. In order'gto'facilitate access for purposes 'of cleaning the'jby-pass 'ispreferably `formed of va plurality 'of rectilinear ducts, lettered S and S1 in the drawing respectively for the lower and-upper casings, which openv out on the exterior `o the parts in which they are contained andare provided with screws S7 for closingfthe openings. The duct S1 at the upper end ofthe valve casing isA turned obliquely as at S2 to accommodate a-needle valve T arranged to be manipulated from the exterior of the casm0'. with the axial duct S3 inthe spindle O2 andl is adapted to register with the duct S2 when the throttle valve is closed. The .duct S2 continues outwardly beyond the ductl S4 and' terminates in a transverse opening S provided with av seat at one end for a ball valve T2 and having mounted in its opposite end an adjusting screw T1. VThe ductv S1 runs axially through thespindlevpreferably to a` point substantially centrally of the valve lO. where it connects with a duct S provided' in' the valve itself terminating at the edge thereof. v

`The action of our improved 'carbureter A transverse duct S4 communicatesl with all the parts' assembled' is substantially' as follows: Hydrocarbon maintainedv at constant level owsout through orifice W' and into the intermediate chamber about the core E1 and'then'ce through the restricted orifice the inliuence of the member lM which'` by VW1' to the' cup E where the sance comes under.

capillary attraction raises the hydrocarbon* tothe upper exposed portion of themember.

from the'. atmosphere under the control of the engine is sucked through duct P2, port Q, duct B and into the interior of the core through apertures E2, where it rises and impinges directly against the member M. The air thereby absorbs and volatilizes the hydrocarbon held by the member, and carries thesame upwardly into the distributing nozzle K1 which, together with the pipe P, forms a carbureting chamber. Here the mixed gas is allowed area to expand and distribute itself and permit of further mixture with the auxiliary air drawn in through apertures l?3 'which it will be seen are arranged concentric with the nozzle, so as not to introduceair while the initial mixing is in progress.

Upon the closing of the throttle valve 0 hydrocarbon. is drawn by the engine up through the by-pass past the needle valve T and in through the ducts provided in the valve and spindle; at the same time air is being admitted past the valve T? and mixes with the hydrocarbon in the duct S3 providing the proper carbureted combustible mixture.

We have described and shown preferred and satisfactory"constructions, but desire it to be understood that slight changes may be resorted to without departing from the spirit of the invention, provided such changes fall within the scope of the appended claims.

We claim:

1. ln a carbureter, a feeding chamber in communication with a source of liquid hydrocarbon, a carbureting chamber in communication with an air supply, capillary means comprising ribs arranged side by side to form unbroken capillary passages therein-between to constitute a member in which such passages run longitudinally of the same for transferring hydrocarbon from said feeding to said carbureting chamber, and means for equalizing the pressure between the two chambers. v i

2. In a carbureter, a feeding chamber in.l communication with a source of liquid hydrocarbon, a carbureting chamber, an air duct leading to saidmixing chamber, a conical capillary member adjustably secured in. said feeding chamber and projecting into said duct tov provide a constricted passage for the air, said member -being provided with ribs arranged side by side to form the capillary passages therein longitudinally of the same, and equalizing means arranged between said feeding and carbureting chambers to neutralize the eEect produced by the suction of the engine.

3. ln a carbureter, a hydrocarbon reservoir, al feeding chamber supplied from said reservoir, a carbureting chamber, an air duct leading to said carbureting chamber., capillary means comprising ribs arranged side by side to form unbroken capillary pasloon before delivery to the cylinders.

4. In a carbureter, a hydrocarbon reser- Voir provided with an opening therethrough, a hollow core fitted in the opening, an air duct communicating with the interior of said core, a cup carried by said core .constituting an annular feeding chamber lin communication with said reservoir, and a capillary member supported in said cup and' projecting beyond the end of said core, said member being-provided with ribs arranged side by side to form the capillary passages therein longitudinally of the same.

5. In a carbureter, a hydrocarbon reservoir provided with an opening there` through, a hollow core removably iitted in the openingy and provided with a conical upper end, a cup formed on said core and providing with the conical upper end, an annular feeding chamber in communication with said reservoir, a conical capillary memi ber mopnted over Vthe -upper end of said core and projecting therebeyond, said member being provided with ribs arranged side by side tol form the capillary passages air supply. in communication with the interior of said core..

6. In a carbureter, a hydrocarbon reservoir provided withl an. opening therethrough, a hollow core removably tted in the opening and provided with a conical upper end, an air supply communlcating with the interior of said core, a cup formed on said core and providing'with the conical upper endan annular feeding chamber in communication with said reservoir, a conical capillary member mounted over the upperend of said core and projecting therebeyond, said member being provided with ribs arranged side by side to form the capillary passages therein longitudinally of the 7. In a carbureter, a hydrocarbon'reser voir provided with an opening therethrough, a hollow core .of lesser diameter removably fitted in the opening and protherein longitudinally ofthe same, andan los lll@

vided with a conical upper end, a eup f formed oir-.said core p and providing with the comcal upper end an annular means for feedingv chafniber', a flange on said core providing between the ysaine andsaid clip anv annular' communicating passage between said reservoiraild feeding Chamber,

` .side by side to forin the capillary passages therein longitudinally ofl the saine, and

member.

8. In a carbureter, a hydrocarbonreservon' provided with an 'opening therethrough,a eore of lesser 'diameter removably fitted therein and provided with a' conical upper end, fa cup formed on said core andv providil'ig with the upper end an annular feeding chamber, a ilange on said core below the vcup and providing' therewith an annular communicating passage between said bowl and reservoir, an air chamber surroundmg regulating the action of said and communicating with the interior of .the

f core below said flange,` facap i1lary conical ried by said'sleeve, an lannular' auxiliary air lchamber arranged above lsaid core and substantially concentric 4with said nozzle, and a duct for supplying air to Said aux#` iliary ehamber`.`

In testimony whereof we have Isigned our names to this specication'in the presence of two subscribing Witnesses.

REGNALD HOFFGARD SHOOBRIDGE. f ARTHUR FREDERICKGUNSTONE. I ,'VVitnesses: l,

E. J. FUssELL. E. T YLR. 

